/Engine/Source/Runtime/Engine/Classes/Sound/SoundConcurrency.h
Returns a newly allocated active sound given the input active sound struct. Will return nullptr if the active sound concurrency evaluation doesn't allow for it.
[FActiveSound](API\Runtime\Engine\FActiveSound) * CreateNewActiveSound ( const [FActiveSound](API\Runtime\Engine\FActiveSound) & NewActiveSound, bool bIsRetriggering )